@Beno10_MFC Start with 0$
0-800 = owe 800$
Sell it 1000$ = -800 + 1000 = 200$
Then you buy one more time with 1100$ = 200 - 1100 = owe 900
Then you sell it one more time with 1300$
= -900 + 1300 = 400$, then you earn total 400$
@baharkarakrt There is no unique value of b. Every nonzero value of b satisfies the equation.
B=0 is not valid because division by zero is undefined.
trust me, im asian